一致空间法在数字伺服系统故障检测及隔离中的应用

The application of parity space approaches to fault detection and isolation in digital servo systems

研究基于时间冗余的一致空间法在线性时不变系统故障检测及隔离中的应用,指出系统在某一时刻某个故障在一致空间中位于固定方向。通过选取最优转换矩阵,将这一方向与其它因素在一致空间中所在方向相分离,提出一种故障隔离的方法。通过在一套数字伺服系统中的实验,表明此方法可以实时实现故障检测及隔离。

Fault detection and isolation in linear time-invariant systems are investigated by using the time redundancy based parity space approaches. It is pointed out that a given fault at a given time lies in the fixed direction in the parity space. The method for fault isolation is presented by separating this fixed direction from the directions in the parity space of the other factors by using the optimal transformation matrices. Through the experiments on a digital servo system it is shown that realtime fault detection and isolation can be realized by this method.